[jbest3025]

2 C5H10 + 15 O2 --> 10 CO2 + 10 H2O


1.   If the reaction consumes 4.12 grams of oxygen how many moles of oxygen are consumed?
2.   How many moles of water are produced from 4.12 grams of oxygen? How many grams of water?
3.   Assuming 100% reaction, how many grams of carbon dioxide can be produced by reacting 6.81 grams of C5H10?
4.   If the reaction of 6.81 grams of C5H10 yields 19.2 grams of carbon dioxide.  Find the percentage yield.

[Borek]

http://www.chembuddy.com/?left=balancing-stoichiometry&right=stoichiometric-calculations

[S.V.]

1) What is the atomic mass of oxygen, and what units is it in? From there you should be able to convert grams to moles.
2) Look at mole ratios. How many moles of H₂O are produced per mole of O₂? After getting moles, you can again use atomic mass (this time of H₂O of course) to calculate grams.
3) Same thing as steps 1 and 2.
4) Calculate how much CO₂ will be produced by 6.81 grams C₅H₁₀ in a 100% reaction (100% reaction means that at the end, there is no remaining C₅H₁₀ or O₂ remaining as all has reacted) and compare it to the given 19.2 grams.